onromney. presidentpiled on, turning his own gaffes into laugh lines. >> i want to see us export more jobs. export more products. excuse me. ( laughter ) i was-- i-- i was channeling my opponent there for a second. ( laughter ) >> schieffer: and advice and constellations. >> there are 40 days left until the election. obama cowl make a gaffe. mitt would win the debates, go could send a flood to destroy all mankind. ( laughter ) so there's hope. >> schieffer: short of building an ark, what is romney's best chance. we'll ask new jersey governor chris christie, and one-time adversary, newt gingrich. so far romney is sticking to a familiar theme, but does he need to do more? >> i will lower the tax rate. he wants to creat to raise them. i'll create jobs and he'll kill them. also marsha blackburn, bob shrum, and larry sabato from the university of virginia center for politics. as we head into first presidential debate, we'll talk about the state of america at home and abroad with the distinguished panel. michelle rhee, former head of the washington, d.c. school system and founder of students